LAS VEGAS, NV - APRIL 09:  "Jeopardy!" host Alex Trebek speaks as he is inducted into the National Association of Broadcasters Broadcasting Hall of Fame during the NAB Achievement in Broadcasting Dinner at the Encore Las Vegas on April 9, 2018 in Las Vegas, Nevada. NAB Show, the trade show of the National Association of Broadcasters and the world's largest electronic media show, runs through April 12 and features more than 1,700 exhibitors and 102,000 attendees.  (Photo by Ethan Miller/Getty Images)
Alex Trebek says chemo has led to depression
01:27 - Source: CNN Business
CNN  — 

Even as he battles pancreatic cancer, Alex Trebek still has his sense of humor.

“I’ve got stage 4 cancer, okay,” the “Jeopardy!” host joked to CBS Sunday Morning. “Not stage 1, for sissies, that’s just beginner’s cancer. I’ve got advanced!”

Trebek, 78, sat down with Jane Pauley to talk about his illness.

In March, he posted a video on the show’s official YouTube account announcing his diagnosis.

Alex Trebek announces he has stage 4 pancreatic cancer

Trebek didn’t miss a day of work, even while undergoing chemotherapy.

‘It wouldn’t be right for me to walk away from this if I can possibly do it and I managed to do it,” he said. “So what’s the big deal?”

Constant pain in his stomach earlier this year led to testing which found a bulge in his stomach that he said was “the size of a small fist.”

Alex Trebek: I have ‘surges of deep, deep sadness’ but I’m optimistic about the future

Trebek said that early on in his treatment he suffered from excruciating pain both on and off camera while working on “Jeopardy!”

“I was on the floor writhing in pain. It went from a 3 to an 11,” Trebek said. “And it happened three or four times that day while we were taping. So, that was a little rough on me.”

He said he’s been wearing a hairpiece to deal with the hair loss from chemotherapy.

Trebek credited his youthful appearance to having “Good genes.”

“My mother passed away a couple of years ago at the age of 95,” he said. “So, if I have a majority of her genes, I should be okay for a while.”